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Dilithium Hexaorganostannate(IV) Compounds
Author(s) -
Schrader Ireen,
Zeckert Kornelia,
Zahn Stefan
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201406260
Subject(s) - dilithium , tin , carbon group , germanium , valence (chemistry) , main group element , crystallography , chemistry , valence electron , silicon , group (periodic table) , inert gas , solid state , stereochemistry , electron , organic chemistry , physics , catalysis , transition metal , ion , quantum mechanics , deprotonation
Hypercoordination of main‐group elements such as the heavier Group 14 elements (silicon, germanium, tin, and lead) usually requires strong electron‐withdrawing ligands and/or donating groups. Herein, we present the synthesis and characterization of two hexaaryltin(IV) dianions in form of their dilithium salts [Li 2 (thf) 2 {Sn(2‐py Me ) 6 }] (py Me =C 5 H 3 N‐5‐Me) ( 2 ) and [Li 2 {Sn(2‐py O t Bu ) 6 }] (py O t Bu =C 5 H 3 N‐6‐O t Bu) ( 3 ). Both complexes are stable in the solid state and solution under inert conditions. Theoretical investigations of compound 2 reveal a significant valence 5s‐orbital contribution of the tin atom forming six strongly polarized tin–carbon bonds.